Heart trocar



DBC. 8, 1931. 4 'E B DONQVAN l 1,835,287

' HEART TaocAR- med neg/1.8i 1929 The object of my invention is to provide a heart trocar which is simple, durable andV comparatively inexpensive to manufacture.

More particularly, it is my object to provide a heart trocar for the use of embalmers when aspirating blood from the heart of a deceased person, the trocar having several advantageous features whereby the heart may be effectively punctured without the possibility of erroneously puncturing it at a wrong point on its surfaces with the consequent result that the heart is not' properly aspirated and the face of the person may become blackened from such improper aspiration. Y

Still a further object is to provide a heart trocar comprising a tubular casing having an "end in the shape of atruncated cone withya pointed rod slidably mounted therein so that the point thereof canbe entirely housed Within the tubulary casing, or can be extended beyond the end thereof as desired.

A further object is to provide stop means so that the point on the rod can be positively held in retracted or extended position as desired. Y

With these and other objects in view my invention consists in the construction, arrangement and combination of the various parts of my device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claim and illustrated in the accompanying drawings. Although the invention is suceptible of a variety of embodiments, it is unnecessary to fully describe and illustrate more than one in order to give a full understanding of the invention both from its structural and` functional standpoints. Accordingly, 'I have ilpoint extended for this purpose.

Application med December 18'; "192 lustrated a preferred and desirable embodi-y @Figure im .Siae liiienvef thefaoca with the point retracted as whenfeelinglover 1 Figuref isiv aside rielevationillustrating the dottedr'lines a fhose; VVconnection; `use j espn-ating processi-ji e trocarl piercingiffthe "heartfandf showing ,i

The lb'pposite end f thefrodjleiis prcvd'ed waarmee l `nein er1-ep mondi/i ert-lietatuiaeasmg hefoperationiof mybimproved trocar for aspirating'-bloode jfromi fthef heart; thefdevice isyladjustedjasshownfini FigureE 2 with the lug 'cacting iiviththef fdep' slot @226; i! 1 In this positionl the fpoint 20y f of CtliefrodflS Iextenids beyond the "tapered; end 12 ofjtheitubul arV easy-` ingilOf asi shownl in-.1 Eigures12'1andjr6l vllVh'en" Vso adjusted:tlieh-trocar lisadaptedlforfpierci ing)f the@V epidermis fjSQf for exten dingA .through thetloiyacicfcavity. 32 ofthebody toward the heart 34:. As soon as the point. is received within the'thoracic cavity the rod 18 is withdrawn and given a half turn andthe lug'28 is then caused to coact with the shallow slot24 as shown in Figure 3. y Y

' In this adjustment the trocar presents a blunt point to the'heart 34 so that the surface of the heart can be engaged. and the trocar manipulated to determine the exact position of theheart without danger of piercing it prematurely. In this connection it may he mentioned that heretofore heart trooars have 5 been used and feeling for the heart entails danger of prematurely puncturing it in the wrong place with the deplorable result of improperly aspirating the blood from the heart. It is necessary to pierce the right auricle of the heart and by determining the position of the heart with the trocar bluntly adjusted, the inner end of the trocar may be moved to the proper position for punctu`ring. The knob 22 is then manipulated for again extending the point 20 as shown in Figure 4, whereupon the heart may be punctured.

The tubular casing l0 is now left in the position shown in Figure 4 and the rod 18 lo withdrawn whereafter the suction hose 1G is applied to the portion 14 of the casing l0 and the aspirating process started.

Figure l illustrates how the` aspirating process is accomplished. A container A3G hav- 85 ing a goose'neck litting consisting of a cork 38 and straight tubes 40 and 42 therethrough is used. A second suction hose 44 is applied to the tube 42 and connected with the intake side of an air pump 46 whereby a vacuum 80 may be created within the container 36 and the blood may be withdrawnY from the heart and will collect in the container 36;

The aspirating process, of course,v is well known to embali'ners and funeral directors, 86 but my improved two part trocar is a substan-Y tial improvement over trocar's now on the market.

Some changes may be made in the eonstruc= tio'n and arrangement of the parts of my heart trocar without departing from the real spirit and purpose of my invention, and vit is my intention to cover by my claim,` any modiL lied forms of structure or use of mechanical equivalents, which may be reasonably in- .45 eluded within their scope. e

I claim as my invention: y In a heart troca'r, a tubular casing, a pointed rod slidable relative thereto and removable therefrom and c'oacting stop means on the casing and rod for selectively positioning the point of said rod entirely with-in said casing or extending beyond the end thereof, said stop means comprising a pair of slots of different depths and a lug slidable to position within either of said slots selectively.

Des Moines, Iowa, December 9i 1929.`

EDWARD B. DONOVAN.- 

